2014 aerosol optical depths. Modeled aerosol optical depths (Naval Research Laboratory; http://www.nrlmry.navy.mil/aerosol/) for the 2014 sea surface microlayer and underlying water column sampling periods. The study site is circled in black and the green contour lines (following the color scale bar) represent the optical dust depth (based on light scattering at 550 nm). DOI: https://doi.org/10.1525/elementa.237.f3